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 (
    4570, 1615, 2228, 2593, 3743, 4567, 3112, 
    2441, 2877, 2938, 3944, 4598, 4752, 
    5250, 7616, 5919, 3569, 5817, 3033, 
    5923, 4503, 3104, 4138, 2177, 2942, 
    3664, 5936, 3126, 3370, 7293, 2203, 
    2618, 2788, 4225, 5837, 7279, 7617, 
    2649, 7620, 855
  )

Query time 0.00088

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "57.16"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "p",
          "access_type": "range",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "product_id"
          ],
          "key_length": "3",
          "rows_examined_per_scan": 41,
          "rows_produced_per_join": 41,
          "filtered": "100.00",
          "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`p`.`product_id` in (4570,1615,2228,2593,3743,4567,3112,2441,2877,2938,3944,4598,4752,5250,7616,5919,3569,5817,3033,5923,4503,3104,4138,2177,2942,3664,5936,3126,3370,7293,2203,2618,2788,4225,5837,7279,7617,2649,7620,855))",
          "cost_info": {
            "read_cost": "24.36",
            "eval_cost": "4.10",
            "prefix_cost": "28.46",
            "data_read_per_join": "656"
          },
          "used_columns": [
            "product_id",
            "parent_product_id",
            "group_id"
          ]
        }
      },
      {
        "table": {
          "table_name": "g",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "id"
          ],
          "key_length": "3",
          "ref": [
            "softwarepirmam_hewadelivard_cscart_4.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 41,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "10.25",
            "eval_cost": "4.10",
            "prefix_cost": "42.81",
            "data_read_per_join": "16K"
          },
          "used_columns": [
            "id",
            "code"
          ]
        }
      },
      {
        "table": {
          "table_name": "f",
          "access_type": "ref",
          "possible_keys": [
            "idx_group_id"
          ],
          "key": "idx_group_id",
          "used_key_parts": [
            "group_id"
          ],
          "key_length": "3",
          "ref": [
            "softwarepirmam_hewadelivard_cscart_4.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 41,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "10.25",
            "eval_cost": "4.10",
            "prefix_cost": "57.16",
            "data_read_per_join": "4K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}