SELECT 
  SQL_CALC_FOUND_ROWS products.product_id, 
  products.amount, 
  descr1.product as product, 
  companies.company as company_name, 
  variation_group_products.group_id AS variation_group_id, 
  products.product_type, 
  products.parent_product_id, 
  products.master_product_offers_count, 
  products.master_product_id, 
  products.company_id, 
  products.original_vendor_id, 
  IF(
    products.age_verification = 'Y', 
    'Y', 
    IF(
      cscart_categories.age_verification = 'Y', 
      'Y', cscart_categories.parent_age_verification
    )
  ) as need_age_verification, 
  IF(
    products.age_limit > cscart_categories.age_limit, 
    IF(
      products.age_limit > cscart_categories.parent_age_limit, 
      products.age_limit, cscart_categories.parent_age_limit
    ), 
    IF(
      cscart_categories.age_limit > cscart_categories.parent_age_limit, 
      cscart_categories.age_limit, cscart_categories.parent_age_limit
    )
  ) as age_limit, 
  descr1.full_description as full_description, 
  descr1.short_description as short_description 
FROM 
  cscart_products as products 
  LEFT JOIN cscart_product_descriptions as descr1 ON descr1.product_id = products.product_id 
  AND descr1.lang_code = 'de' 
  LEFT JOIN cscart_companies AS companies ON companies.company_id = products.company_id 
  INNER JOIN cscart_products_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN cscart_categories ON cscart_categories.category_id = products_categories.category_id 
  AND (
    cscart_categories.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_categories.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_categories.usergroup_ids
    )
  ) 
  AND cscart_categories.status IN ('A', 'H') 
  AND cscart_categories.storefront_id IN (0, 1) 
  LEFT JOIN cscart_warehouses_sum_products_amount as war_sum_amount ON war_sum_amount.product_id = products.product_id 
  LEFT JOIN cscart_warehouses_destination_products_amount AS warehouses_destination_products_amount ON warehouses_destination_products_amount.product_id = products.product_id 
  AND warehouses_destination_products_amount.destination_id = 11 
  AND warehouses_destination_products_amount.storefront_id = 0 
  INNER JOIN cscart_product_variation_group_products AS variation_group_products ON variation_group_products.product_id = products.product_id 
WHERE 
  1 
  AND (
    companies.status IN ('A') 
    OR products.company_id = 0
  ) 
  AND products.company_id IN (
    2, 3, 4, 7, 14, 15, 21, 23, 25, 26, 27, 28, 
    30, 31, 33, 34, 35, 36, 37, 38, 40, 72, 
    73, 74, 78, 89, 0
  ) 
  AND (
    (
      CASE products.is_stock_split_by_warehouses WHEN 'Y' THEN warehouses_destination_products_amount.amount ELSE products.amount END
    ) > 0 
    OR products.tracking = 'D'
  ) 
  AND (
    products.usergroup_ids = '' 
    OR FIND_IN_SET(0, products.usergroup_ids) 
    OR FIND_IN_SET(1, products.usergroup_ids)
  ) 
  AND products.status IN ('A') 
  AND variation_group_products.group_id IN (61, 58) 
  AND products.master_product_status IN ('A') 
  AND products.product_type != 'D' 
GROUP BY 
  products.product_id 
ORDER BY 
  NULL asc

Query time 0.00190

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.048284586,
    "temporary_table": {
      "nested_loop": [
        {
          "table": {
            "table_name": "variation_group_products",
            "access_type": "range",
            "possible_keys": ["PRIMARY", "idx_group_id"],
            "key": "idx_group_id",
            "key_length": "3",
            "used_key_parts": ["group_id"],
            "loops": 1,
            "rows": 7,
            "cost": 0.004290555,
            "filtered": 100,
            "attached_condition": "variation_group_products.group_id in (61,58)",
            "using_index": true
          }
        },
        {
          "table": {
            "table_name": "products",
            "access_type": "eq_ref",
            "possible_keys": ["PRIMARY", "status"],
            "key": "PRIMARY",
            "key_length": "3",
            "used_key_parts": ["product_id"],
            "ref": ["u428615623_ecartifygonje.variation_group_products.product_id"],
            "loops": 7,
            "rows": 1,
            "cost": 0.01199548,
            "filtered": 59.22746658,
            "attached_condition": "products.company_id in (2,3,4,7,14,15,21,23,25,26,27,28,30,31,33,34,35,36,37,38,40,72,73,74,78,89,0) and (products.usergroup_ids = '' or find_in_set(0,products.usergroup_ids) or find_in_set(1,products.usergroup_ids)) and products.`status` = 'A' and products.master_product_status = 'A' and products.product_type <> 'D'"
          }
        },
        {
          "table": {
            "table_name": "descr1",
            "access_type": "eq_ref",
            "possible_keys": ["PRIMARY", "product_id"],
            "key": "PRIMARY",
            "key_length": "9",
            "used_key_parts": ["product_id", "lang_code"],
            "ref": [
              "u428615623_ecartifygonje.variation_group_products.product_id",
              "const"
            ],
            "loops": 4.145922747,
            "rows": 1,
            "cost": 0.007104619,
            "filtered": 100,
            "attached_condition": "trigcond(descr1.lang_code = 'de')"
          }
        },
        {
          "table": {
            "table_name": "companies",
            "access_type": "eq_ref",
            "possible_keys": ["PRIMARY"],
            "key": "PRIMARY",
            "key_length": "4",
            "used_key_parts": ["company_id"],
            "ref": ["u428615623_ecartifygonje.products.company_id"],
            "loops": 4.145922747,
            "rows": 1,
            "cost": 0.006165879,
            "filtered": 100,
            "attached_condition": "trigcond(companies.`status` = 'A' or products.company_id = 0)"
          }
        },
        {
          "table": {
            "table_name": "products_categories",
            "access_type": "ref",
            "possible_keys": ["PRIMARY", "pt"],
            "key": "pt",
            "key_length": "3",
            "used_key_parts": ["product_id"],
            "ref": ["u428615623_ecartifygonje.variation_group_products.product_id"],
            "loops": 4.145922747,
            "rows": 1,
            "cost": 0.004854862,
            "filtered": 100,
            "using_index": true
          }
        },
        {
          "table": {
            "table_name": "cscart_categories",
            "access_type": "eq_ref",
            "possible_keys": ["PRIMARY", "c_status", "p_category_id"],
            "key": "PRIMARY",
            "key_length": "3",
            "used_key_parts": ["category_id"],
            "ref": ["u428615623_ecartifygonje.products_categories.category_id"],
            "loops": 4.145922747,
            "rows": 1,
            "cost": 0.004527479,
            "filtered": 100,
            "attached_condition": "(cscart_categories.usergroup_ids = '' or find_in_set(0,cscart_categories.usergroup_ids) or find_in_set(1,cscart_categories.usergroup_ids)) and cscart_categories.`status` in ('A','H') and cscart_categories.storefront_id in (0,1)"
          }
        },
        {
          "table": {
            "table_name": "war_sum_amount",
            "access_type": "ref",
            "possible_keys": ["PRIMARY"],
            "key": "PRIMARY",
            "key_length": "3",
            "used_key_parts": ["product_id"],
            "ref": ["u428615623_ecartifygonje.variation_group_products.product_id"],
            "loops": 4.145922747,
            "rows": 1,
            "cost": 0.004818233,
            "filtered": 100
          }
        },
        {
          "table": {
            "table_name": "warehouses_destination_products_amount",
            "access_type": "eq_ref",
            "possible_keys": ["PRIMARY", "idx_storefront_id"],
            "key": "PRIMARY",
            "key_length": "9",
            "used_key_parts": ["product_id", "destination_id", "storefront_id"],
            "ref": [
              "u428615623_ecartifygonje.variation_group_products.product_id",
              "const",
              "const"
            ],
            "loops": 4.145922747,
            "rows": 1,
            "cost": 0.004527479,
            "filtered": 100,
            "attached_condition": "trigcond(case products.is_stock_split_by_warehouses when 'Y' then warehouses_destination_products_amount.amount else products.amount end > 0 or products.tracking = 'D')"
          }
        }
      ]
    }
  }
}