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 (
    13407, 13439, 13440, 13441, 13442, 13443, 
    13499, 13444, 13445, 13408, 13446, 
    13447, 13448, 13409, 13504, 13410, 
    13449, 13450, 13411, 13412, 13413, 
    13414, 13415, 13451
  )

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.09366448,
    "nested_loop": [
      {
        "table": {
          "table_name": "p",
          "access_type": "range",
          "possible_keys": ["PRIMARY", "idx_group_id"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "loops": 1,
          "rows": 24,
          "cost": 0.02605648,
          "filtered": 100,
          "attached_condition": "p.product_id in (13407,13439,13440,13441,13442,13443,13499,13444,13445,13408,13446,13447,13448,13409,13504,13410,13449,13450,13411,13412,13413,13414,13415,13451)"
        }
      },
      {
        "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": ["u508912950_dev_2025.p.group_id"],
          "loops": 24,
          "rows": 1,
          "cost": 0.04532224,
          "filtered": 100
        }
      },
      {
        "table": {
          "table_name": "g",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["id"],
          "ref": ["u508912950_dev_2025.p.group_id"],
          "loops": 24,
          "rows": 1,
          "cost": 0.02228576,
          "filtered": 100
        }
      }
    ]
  }
}

Result

feature_id purpose product_id parent_product_id id code
601 group_variation_catalog_item 13439 0 31 PV-2A901B48
601 group_variation_catalog_item 13440 0 32 PV-3C572D69
601 group_variation_catalog_item 13441 0 33 PV-4E813F02
601 group_variation_catalog_item 13442 0 34 PV-5G294H73
601 group_variation_catalog_item 13443 0 35 PV-6I635J14
601 group_variation_catalog_item 13444 0 36 PV-7K046L85
601 group_variation_catalog_item 13445 0 37 PV-8M750N26
601 group_variation_catalog_item 13446 0 38 PV-9O167P97
601 group_variation_catalog_item 13447 0 39 PV-0Q481R38
601 group_variation_catalog_item 13448 0 40 PV-1S928T59
601 group_variation_catalog_item 13449 0 41 PV-2U539V01
601 group_variation_catalog_item 13450 0 42 PV-3W864X72
601 group_variation_catalog_item 13451 0 43 PV-4Y175Z83