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, 451, 454, 453, 
    457, 701, 702, 708, 228, 452, 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
  )

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.16258055,
    "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": 158,
          "cost": 0.02982215,
          "filtered": 30.37974739,
          "attached_condition": "p.product_id in (99,97,98,91,96,182,451,454,453,457,701,702,708,228,452,447,829,769,831,818,847,774,833,368,432,433,434,435,436,437,438,439,440,441,442,443,444,445,446,369,417,418,419,420,421,422,423,424)",
          "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": 48,
          "rows": 1,
          "cost": 0.08900608,
          "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": 48,
          "rows": 1,
          "cost": 0.04375232,
          "filtered": 100
        }
      }
    ]
  }
}