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 (
    85479, 86461, 86462, 86737, 86738, 90745, 
    90748, 90751, 90754, 84646, 86604, 
    86673, 83014, 83015, 83546, 83547, 
    90847, 90848, 90926, 90927, 90743, 
    90744, 90746, 90747, 90749, 90750, 
    90752, 90753, 85275, 90742, 82799, 
    82800, 82872, 82873, 82945, 82946, 
    83255, 83257, 83262, 83264, 82797, 
    82870, 82943, 83252, 83259, 84804, 
    84805, 84822, 84823, 84834, 84835, 
    91089, 91175, 91230, 83012, 83013, 
    83544, 83545, 90845, 90846, 90924, 
    90925, 88895, 90823, 91464, 91465, 
    91468, 91469, 90012, 90740, 90741, 
    84514, 84580, 84884, 84899, 88875, 
    88876, 88877, 88878, 88902, 88903, 
    82798, 82871, 82944, 83253, 83260, 
    84798, 84799, 86601, 86602, 86670, 
    86671, 91068, 84878, 82580, 82581
  )

Query time 0.00089

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 (85479,86461,86462,86737,86738,90745,90748,90751,90754,84646,86604,86673,83014,83015,83546,83547,90847,90848,90926,90927,90743,90744,90746,90747,90749,90750,90752,90753,85275,90742,82799,82800,82872,82873,82945,82946,83255,83257,83262,83264,82797,82870,82943,83252,83259,84804,84805,84822,84823,84834,84835,91089,91175,91230,83012,83013,83544,83545,90845,90846,90924,90925,88895,90823,91464,91465,91468,91469,90012,90740,90741,84514,84580,84884,84899,88875,88876,88877,88878,88902,88903,82798,82871,82944,83253,83260,84798,84799,86601,86602,86670,86671,91068,84878,82580,82581))",
          "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"
          ]
        }
      }
    ]
  }
}