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 (
    9256, 9265, 9266, 9267, 9268, 9276, 9297, 
    9303, 9304, 9307, 9452, 9458, 9459, 
    9462, 9463, 9485, 9533, 9552, 9764, 
    9800, 9804, 9808, 9809, 9822, 9852, 
    9854, 9901, 9942, 9947, 9982, 10084, 
    8551, 8556, 8610, 8613, 8634, 8640, 
    8744, 8747, 8761, 8769, 8773, 8832, 
    8968, 8970, 8971, 8972, 8975, 9022, 
    9027, 9066, 9084, 9093, 9119, 9127, 
    9134, 9161, 9179, 9187, 9193, 9196, 
    9202, 9250, 9251, 9252, 9258, 9259, 
    9260, 9262, 9263, 9264, 9271, 9272, 
    9277, 9279, 9295, 9298, 9300, 9302, 
    9308
  )

Query time 0.00070

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "112.01"
    },
    "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": 80,
          "rows_produced_per_join": 80,
          "filtered": "100.00",
          "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`p`.`product_id` in (9256,9265,9266,9267,9268,9276,9297,9303,9304,9307,9452,9458,9459,9462,9463,9485,9533,9552,9764,9800,9804,9808,9809,9822,9852,9854,9901,9942,9947,9982,10084,8551,8556,8610,8613,8634,8640,8744,8747,8761,8769,8773,8832,8968,8970,8971,8972,8975,9022,9027,9066,9084,9093,9119,9127,9134,9161,9179,9187,9193,9196,9202,9250,9251,9252,9258,9259,9260,9262,9263,9264,9271,9272,9277,9279,9295,9298,9300,9302,9308))",
          "cost_info": {
            "read_cost": "48.01",
            "eval_cost": "8.00",
            "prefix_cost": "56.01",
            "data_read_per_join": "1K"
          },
          "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": 80,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "20.00",
            "eval_cost": "8.00",
            "prefix_cost": "84.01",
            "data_read_per_join": "31K"
          },
          "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": 80,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "20.00",
            "eval_cost": "8.00",
            "prefix_cost": "112.01",
            "data_read_per_join": "8K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}