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 (
    98197, 98198, 98199, 98208, 98209, 98210, 
    98211, 98212, 98213, 98214, 98215, 
    98216, 98217, 98218, 98219, 98220, 
    98221, 98222, 98223, 98322, 98323, 
    98538, 98539, 98540, 98541, 98542, 
    98543, 98544, 98545, 98546, 98547, 
    98548, 98549, 98563, 98564, 98565, 
    98566, 98567, 98568, 98569, 99519, 
    99520, 99521, 99522, 99523, 99524, 
    99525, 99526, 99527, 100971, 100972, 
    100973, 100974, 100975, 100976, 100977, 
    100978, 100979, 100980, 100981, 100982, 
    100983, 100984, 100988, 101102, 101103, 
    101104, 101628, 101629, 101630, 101631, 
    101632, 101633, 101678, 101679, 101680, 
    101681, 101740, 101741, 101742, 101743, 
    101854, 101855, 101856, 101857, 101858, 
    101859, 101860, 101861, 101862, 101863, 
    101864, 101865, 101866, 101867, 101868
  )

Query time 0.00062

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 (98197,98198,98199,98208,98209,98210,98211,98212,98213,98214,98215,98216,98217,98218,98219,98220,98221,98222,98223,98322,98323,98538,98539,98540,98541,98542,98543,98544,98545,98546,98547,98548,98549,98563,98564,98565,98566,98567,98568,98569,99519,99520,99521,99522,99523,99524,99525,99526,99527,100971,100972,100973,100974,100975,100976,100977,100978,100979,100980,100981,100982,100983,100984,100988,101102,101103,101104,101628,101629,101630,101631,101632,101633,101678,101679,101680,101681,101740,101741,101742,101743,101854,101855,101856,101857,101858,101859,101860,101861,101862,101863,101864,101865,101866,101867,101868))",
          "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"
          ]
        }
      }
    ]
  }
}