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 (
    5504, 5384, 5506, 6018, 6749, 5385, 5464, 
    6185, 6735, 6114, 5647, 6713, 6146, 
    6187, 6742, 5651, 6086, 6299, 6307, 
    6371, 5508, 6081, 8812, 6740, 6705, 
    6144, 6254, 6433, 6755, 6228, 6192, 
    6227, 6356, 6710, 6083, 6230, 6275, 
    6277, 6393, 6426, 6258, 6428, 8800, 
    6255, 8576, 6394, 6229, 6256, 6189, 
    6257, 6259, 6145, 6332, 6362, 8577, 
    6278, 5644, 6226, 6279, 6392, 6297, 
    6354, 6331, 6337, 6395, 6423, 6427, 
    6364, 8569, 6190, 6276, 6303, 6359, 
    6429, 6280, 6260, 6305, 6330, 6434, 
    6355
  )

Query time 0.00108

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "114.31"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "p",
          "access_type": "range",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "product_id"
          ],
          "key_length": "3",
          "rows_examined_per_scan": 82,
          "rows_produced_per_join": 82,
          "filtered": "100.00",
          "index_condition": "(`softwarepirmam_hewadelivard_cscart_4`.`p`.`product_id` in (5504,5384,5506,6018,6749,5385,5464,6185,6735,6114,5647,6713,6146,6187,6742,5651,6086,6299,6307,6371,5508,6081,8812,6740,6705,6144,6254,6433,6755,6228,6192,6227,6356,6710,6083,6230,6275,6277,6393,6426,6258,6428,8800,6255,8576,6394,6229,6256,6189,6257,6259,6145,6332,6362,8577,6278,5644,6226,6279,6392,6297,6354,6331,6337,6395,6423,6427,6364,8569,6190,6276,6303,6359,6429,6280,6260,6305,6330,6434,6355))",
          "cost_info": {
            "read_cost": "48.71",
            "eval_cost": "8.20",
            "prefix_cost": "56.91",
            "data_read_per_join": "1K"
          },
          "used_columns": [
            "product_id",
            "parent_product_id",
            "group_id"
          ]
        }
      },
      {
        "table": {
          "table_name": "g",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "id"
          ],
          "key_length": "3",
          "ref": [
            "softwarepirmam_hewadelivard_cscart_4.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 82,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "20.50",
            "eval_cost": "8.20",
            "prefix_cost": "85.61",
            "data_read_per_join": "32K"
          },
          "used_columns": [
            "id",
            "code"
          ]
        }
      },
      {
        "table": {
          "table_name": "f",
          "access_type": "ref",
          "possible_keys": [
            "idx_group_id"
          ],
          "key": "idx_group_id",
          "used_key_parts": [
            "group_id"
          ],
          "key_length": "3",
          "ref": [
            "softwarepirmam_hewadelivard_cscart_4.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 82,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "20.50",
            "eval_cost": "8.20",
            "prefix_cost": "114.31",
            "data_read_per_join": "8K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}