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 (
    2286, 2685, 2341, 2623, 2774, 2455, 10033, 
    2444, 8398, 2304, 2354, 2374, 2438, 
    2499, 2453, 2581, 2110, 8484, 2250, 
    8485, 2454, 2303, 8488, 8486
  )

Query time 0.00080

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "33.61"
    },
    "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": 24,
          "rows_produced_per_join": 24,
          "filtered": "100.00",
          "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`p`.`product_id` in (2286,2685,2341,2623,2774,2455,10033,2444,8398,2304,2354,2374,2438,2499,2453,2581,2110,8484,2250,8485,2454,2303,8488,8486))",
          "cost_info": {
            "read_cost": "14.41",
            "eval_cost": "2.40",
            "prefix_cost": "16.81",
            "data_read_per_join": "384"
          },
          "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": 24,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "6.00",
            "eval_cost": "2.40",
            "prefix_cost": "25.21",
            "data_read_per_join": "9K"
          },
          "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": 24,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "6.00",
            "eval_cost": "2.40",
            "prefix_cost": "33.61",
            "data_read_per_join": "2K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}

Result

feature_id purpose product_id parent_product_id id code
656 group_variation_catalog_item 2110 0 150 PV-AEEA0D394
656 group_variation_catalog_item 2304 0 168 PV-9D9AC0687
656 group_variation_catalog_item 2374 0 177 PV-026C159C5
766 group_catalog_item 2438 0 814 PV-26DC85BFE
766 group_catalog_item 2455 0 813 PV-4DAAA7BAA
656 group_variation_catalog_item 2499 0 205 PV-73BE8BF5C
656 group_variation_catalog_item 2581 0 230 PV-02AE72AF3
643 group_variation_catalog_item 2623 0 241 PV-8D16C295C
656 group_variation_catalog_item 2623 0 241 PV-8D16C295C
648 group_variation_catalog_item 2623 0 241 PV-8D16C295C
656 group_variation_catalog_item 2685 0 257 PV-A9B46B73A
656 group_variation_catalog_item 8398 0 803 PV-BA339DA79
648 group_variation_catalog_item 8398 0 803 PV-BA339DA79
766 group_catalog_item 8484 0 812 PV-02A3AD241
766 group_catalog_item 8485 0 812 PV-02A3AD241
766 group_catalog_item 8486 0 813 PV-4DAAA7BAA
766 group_catalog_item 8488 0 813 PV-4DAAA7BAA