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 (
    85212, 85258, 85120, 87310, 87311, 87322, 
    87323, 87334, 87335, 87346, 87347, 
    86144, 86145, 86167, 86168, 86660, 
    86661, 86729, 86730, 87298, 87299, 
    83070, 83623, 90906, 90985, 85081, 
    85167, 85213, 85259, 86142, 86165, 
    86658, 86727, 85854, 85855, 85864, 
    85865, 85121, 89077, 85317, 85318, 
    85414, 85415, 85465, 85466, 85516, 
    85517, 82852, 82853, 82925, 82926, 
    82998, 82999, 83514, 83515, 83522, 
    83523, 85844, 85845, 85363, 85364, 
    86143, 86166, 86659, 86728, 89069, 
    84337, 85315, 85412, 85463, 85514, 
    82850, 82923, 82996, 83512, 83520, 
    83596, 83597, 83598, 83599, 85361, 
    86180, 86182, 86203, 86205, 86504, 
    86506, 86780, 86782, 89822, 89823, 
    89874, 89875, 89946, 89947, 91512
  )

Query time 0.00088

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 (85212,85258,85120,87310,87311,87322,87323,87334,87335,87346,87347,86144,86145,86167,86168,86660,86661,86729,86730,87298,87299,83070,83623,90906,90985,85081,85167,85213,85259,86142,86165,86658,86727,85854,85855,85864,85865,85121,89077,85317,85318,85414,85415,85465,85466,85516,85517,82852,82853,82925,82926,82998,82999,83514,83515,83522,83523,85844,85845,85363,85364,86143,86166,86659,86728,89069,84337,85315,85412,85463,85514,82850,82923,82996,83512,83520,83596,83597,83598,83599,85361,86180,86182,86203,86205,86504,86506,86780,86782,89822,89823,89874,89875,89946,89947,91512))",
          "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"
          ]
        }
      }
    ]
  }
}