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 (
    13416, 13417, 13418, 13452, 13419, 13420, 
    13453, 13502, 13421, 13501, 13422, 
    13454, 13455, 13423, 13456, 13457, 
    13458, 13459, 13505, 13424, 13496, 
    13425, 13426, 13495
  )

Query time 0.00102

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 (13416,13417,13418,13452,13419,13420,13453,13502,13421,13501,13422,13454,13455,13423,13456,13457,13458,13459,13505,13424,13496,13425,13426,13495)"
        }
      },
      {
        "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
        }
      }
    ]
  }
}