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 (
    95487, 95494, 95495, 95496, 95505, 95506, 
    95509, 95510, 96182, 96183, 96184, 
    96185, 96785, 96786, 96817, 96818, 
    96819, 96820, 96821, 96822, 96823, 
    96824, 96825, 96893, 96894, 96895, 
    96896, 96897, 96898, 96899, 96900, 
    96901, 96902, 96903, 96904, 96905, 
    96906, 96907, 96908, 96909, 96910, 
    96911, 96912, 96913, 96914, 96915, 
    96916, 96969, 96970, 96971, 96972, 
    96973, 96974, 96975, 96976, 96977, 
    96978, 96979, 96980, 98516, 98891, 
    98894, 98895, 98896, 100248, 100249, 
    100250, 100254, 100255, 100256, 100257, 
    100258, 100259, 100328, 100329, 100330, 
    100335, 100336, 100438, 100439, 100440, 
    100441, 100442, 100443, 100444, 101536, 
    101537, 101538, 101539
  )

Query time 0.00082

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 (95487,95494,95495,95496,95505,95506,95509,95510,96182,96183,96184,96185,96785,96786,96817,96818,96819,96820,96821,96822,96823,96824,96825,96893,96894,96895,96896,96897,96898,96899,96900,96901,96902,96903,96904,96905,96906,96907,96908,96909,96910,96911,96912,96913,96914,96915,96916,96969,96970,96971,96972,96973,96974,96975,96976,96977,96978,96979,96980,98516,98891,98894,98895,98896,100248,100249,100250,100254,100255,100256,100257,100258,100259,100328,100329,100330,100335,100336,100438,100439,100440,100441,100442,100443,100444,101536,101537,101538,101539))",
          "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"
          ]
        }
      }
    ]
  }
}