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 (
    4974, 5376, 5397, 4995, 5549, 4992, 4991, 
    5346, 6823, 5472, 5387, 5565, 5309, 
    5386, 5568, 5393, 4988, 5468, 5394, 
    5375, 5396, 4961, 5467, 5370, 5566, 
    4989, 5377, 5369, 5567, 5477, 5374, 
    5550, 5388, 5541, 5564, 5544, 5555, 
    5371, 5392, 5466, 5390, 5372, 5473, 
    6773, 5546, 5391, 5389, 5398, 5469, 
    5543, 5470, 5547, 5534, 5471, 5538, 
    5542, 5548, 6245, 6253, 6241, 6207, 
    6220, 6243, 6553, 7516, 11255, 11277, 
    11280, 10412, 7514, 7521, 7515, 7519, 
    7524, 10371, 11222, 10411, 11102, 11112, 
    10999, 11120, 11311, 11312, 11098, 
    11262, 11283, 11314, 11285, 11286, 
    11290
  )

Query time 0.00212

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "128.31"
    },
    "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": 92,
          "rows_produced_per_join": 92,
          "filtered": "100.00",
          "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`p`.`product_id` in (4974,5376,5397,4995,5549,4992,4991,5346,6823,5472,5387,5565,5309,5386,5568,5393,4988,5468,5394,5375,5396,4961,5467,5370,5566,4989,5377,5369,5567,5477,5374,5550,5388,5541,5564,5544,5555,5371,5392,5466,5390,5372,5473,6773,5546,5391,5389,5398,5469,5543,5470,5547,5534,5471,5538,5542,5548,6245,6253,6241,6207,6220,6243,6553,7516,11255,11277,11280,10412,7514,7521,7515,7519,7524,10371,11222,10411,11102,11112,10999,11120,11311,11312,11098,11262,11283,11314,11285,11286,11290))",
          "cost_info": {
            "read_cost": "54.71",
            "eval_cost": "9.20",
            "prefix_cost": "63.91",
            "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": 92,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "23.00",
            "eval_cost": "9.20",
            "prefix_cost": "96.11",
            "data_read_per_join": "35K"
          },
          "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": 92,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "23.00",
            "eval_cost": "9.20",
            "prefix_cost": "128.31",
            "data_read_per_join": "9K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}