SELECT 
  f.feature_id, 
  f.purpose, 
  p.product_id, 
  p.parent_product_id, 
  g.id, 
  g.code 
FROM 
  cscart_product_variation_group_features AS f 
  INNER JOIN cscart_product_variation_groups AS g ON f.group_id = g.id 
  INNER JOIN cscart_product_variation_group_products AS p ON f.group_id = p.group_id 
WHERE 
  p.product_id IN (
    99, 97, 98, 91, 96, 182, 701, 702, 708, 
    228, 447, 829, 769, 831, 818, 847, 774, 
    833, 368, 432, 433, 434, 435, 436, 437, 
    438, 439, 440, 441, 442, 443, 444, 445, 
    446, 369, 417, 418, 419, 420, 421, 422, 
    423, 424, 425, 426, 427, 428, 429, 430, 
    431, 367, 402, 403, 404, 405, 406, 407, 
    408, 409, 410, 411, 412, 413, 414, 415, 
    416
  )

Query time 0.00052

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.211883405,
    "nested_loop": [
      {
        "table": {
          "table_name": "p",
          "access_type": "index",
          "possible_keys": ["PRIMARY", "idx_group_id"],
          "key": "idx_parent_product_id",
          "key_length": "3",
          "used_key_parts": ["parent_product_id"],
          "loops": 1,
          "rows": 161,
          "cost": 0.030262205,
          "filtered": 40.99378967,
          "attached_condition": "p.product_id in (99,97,98,91,96,182,701,702,708,228,447,829,769,831,818,847,774,833,368,432,433,434,435,436,437,438,439,440,441,442,443,444,445,446,369,417,418,419,420,421,422,423,424,425,426,427,428,429,430,431,367,402,403,404,405,406,407,408,409,410,411,412,413,414,415,416)",
          "using_index": true
        }
      },
      {
        "table": {
          "table_name": "f",
          "access_type": "ref",
          "possible_keys": ["idx_group_id"],
          "key": "idx_group_id",
          "key_length": "3",
          "used_key_parts": ["group_id"],
          "ref": ["u428615623_ecartifygonje.p.group_id"],
          "loops": 66,
          "rows": 1,
          "cost": 0.12176896,
          "filtered": 100
        }
      },
      {
        "table": {
          "table_name": "g",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["id"],
          "ref": ["u428615623_ecartifygonje.p.group_id"],
          "loops": 66,
          "rows": 1,
          "cost": 0.05985224,
          "filtered": 100
        }
      }
    ]
  }
}