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 (
    94273, 94274, 94275, 94276, 94277, 94278, 
    94279, 94280, 94281, 94282, 94283, 
    94284, 94285, 94286, 94287, 94288, 
    94289, 94290, 94291, 94292, 94293, 
    94294, 94295, 94296, 94297, 94298, 
    94299, 94300, 94301, 94302, 94303, 
    94304, 94305, 94306, 94307, 94308, 
    94309, 94310, 94311, 94312, 94313, 
    94314, 94315, 94316, 94317, 94318, 
    94319, 94320, 94321, 94322, 94323, 
    94324, 94325, 94326, 94327, 94328, 
    94329, 94330, 94331, 94332, 94958, 
    95034, 95096, 95097, 95098, 95099, 
    95683, 95702, 95703, 96193, 96194, 
    96841, 96917, 96918, 96919, 96981, 
    96982, 96983, 96984, 96998, 98538, 
    98539, 98540, 98541, 98542, 98543, 
    98544, 98545, 98546, 98547, 98548, 
    98549, 100923, 100924, 100925, 100926
  )

Query time 0.00069

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.05"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "f",
          "access_type": "ALL",
          "possible_keys": [
            "idx_group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "0.25",
            "eval_cost": "0.10",
            "prefix_cost": "0.35",
            "data_read_per_join": "104"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      },
      {
        "table": {
          "table_name": "g",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "id"
          ],
          "key_length": "3",
          "ref": [
            "nuie_scalesta_net.f.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "0.25",
            "eval_cost": "0.10",
            "prefix_cost": "0.70",
            "data_read_per_join": "400"
          },
          "used_columns": [
            "id",
            "code"
          ]
        }
      },
      {
        "table": {
          "table_name": "p",
          "access_type": "ref",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "idx_group_id",
          "used_key_parts": [
            "group_id"
          ],
          "key_length": "3",
          "ref": [
            "nuie_scalesta_net.f.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "index_condition": "(`nuie_scalesta_net`.`p`.`product_id` in (94273,94274,94275,94276,94277,94278,94279,94280,94281,94282,94283,94284,94285,94286,94287,94288,94289,94290,94291,94292,94293,94294,94295,94296,94297,94298,94299,94300,94301,94302,94303,94304,94305,94306,94307,94308,94309,94310,94311,94312,94313,94314,94315,94316,94317,94318,94319,94320,94321,94322,94323,94324,94325,94326,94327,94328,94329,94330,94331,94332,94958,95034,95096,95097,95098,95099,95683,95702,95703,96193,96194,96841,96917,96918,96919,96981,96982,96983,96984,96998,98538,98539,98540,98541,98542,98543,98544,98545,98546,98547,98548,98549,100923,100924,100925,100926))",
          "cost_info": {
            "read_cost": "0.25",
            "eval_cost": "0.10",
            "prefix_cost": "1.05",
            "data_read_per_join": "16"
          },
          "used_columns": [
            "product_id",
            "parent_product_id",
            "group_id"
          ]
        }
      }
    ]
  }
}