SELECT 
  f.feature_id, 
  f.purpose, 
  p.product_id, 
  p.parent_product_id, 
  g.id, 
  g.code 
FROM 
  q_product_variation_group_features AS f 
  INNER JOIN q_product_variation_groups AS g ON f.group_id = g.id 
  INNER JOIN q_product_variation_group_products AS p ON f.group_id = p.group_id 
WHERE 
  p.product_id IN (
    6415, 6416, 6417, 6418, 6419, 6420, 6421, 
    6422, 6423, 6424, 6425, 6426, 6427, 
    6428, 6429, 6430, 6431, 6432, 6433, 
    6434, 6435, 6436, 6437, 6438, 6439, 
    6440, 6441, 6442, 6443, 6444, 6445, 
    6446, 6447, 6448, 6449, 6450, 6451, 
    6452, 6453, 6454, 6456, 6457, 6458, 
    6459, 6460, 6461, 6462, 6463, 6464, 
    6465, 6466, 6467, 6468, 6469, 6470, 
    6471, 6472, 6473, 6474, 6475, 6476, 
    6477, 6478, 6479
  )

Query time 0.00135

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "307.21"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "p",
          "access_type": "range",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "product_id"
          ],
          "key_length": "4",
          "rows_examined_per_scan": 64,
          "rows_produced_per_join": 64,
          "filtered": "100.00",
          "index_condition": "(`portal`.`p`.`product_id` in (6415,6416,6417,6418,6419,6420,6421,6422,6423,6424,6425,6426,6427,6428,6429,6430,6431,6432,6433,6434,6435,6436,6437,6438,6439,6440,6441,6442,6443,6444,6445,6446,6447,6448,6449,6450,6451,6452,6453,6454,6456,6457,6458,6459,6460,6461,6462,6463,6464,6465,6466,6467,6468,6469,6470,6471,6472,6473,6474,6475,6476,6477,6478,6479))",
          "cost_info": {
            "read_cost": "140.81",
            "eval_cost": "12.80",
            "prefix_cost": "153.61",
            "data_read_per_join": "1024"
          },
          "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": "4",
          "ref": [
            "portal.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 64,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "64.00",
            "eval_cost": "12.80",
            "prefix_cost": "230.41",
            "data_read_per_join": "49K"
          },
          "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": "4",
          "ref": [
            "portal.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 64,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "64.00",
            "eval_cost": "12.80",
            "prefix_cost": "307.21",
            "data_read_per_join": "7K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}