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 (
    227, 241, 240, 214, 217, 218, 207, 286, 
    205, 208, 229, 211, 210, 209, 213, 215, 
    226, 228, 247, 244, 212, 206, 223, 225, 
    224, 219, 222, 220, 221
  )

Query time 0.00056

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "139.45"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "p",
          "access_type": "ALL",
          "possible_keys": [
            "PRIMARY",
            "idx_group_id"
          ],
          "rows_examined_per_scan": 108,
          "rows_produced_per_join": 28,
          "filtered": "26.85",
          "cost_info": {
            "read_cost": "18.16",
            "eval_cost": "5.80",
            "prefix_cost": "23.96",
            "data_read_per_join": "463"
          },
          "used_columns": [
            "product_id",
            "parent_product_id",
            "group_id"
          ],
          "attached_condition": "(`atulecarter_atul_demo2`.`p`.`product_id` in (227,241,240,214,217,218,207,286,205,208,229,211,210,209,213,215,226,228,247,244,212,206,223,225,224,219,222,220,221))"
        }
      },
      {
        "table": {
          "table_name": "g",
          "access_type": "eq_ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "id"
          ],
          "key_length": "3",
          "ref": [
            "atulecarter_atul_demo2.p.group_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 28,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "29.00",
            "eval_cost": "5.80",
            "prefix_cost": "58.76",
            "data_read_per_join": "11K"
          },
          "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": [
            "atulecarter_atul_demo2.p.group_id"
          ],
          "rows_examined_per_scan": 3,
          "rows_produced_per_join": 98,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "60.90",
            "eval_cost": "19.79",
            "prefix_cost": "139.45",
            "data_read_per_join": "10K"
          },
          "used_columns": [
            "feature_id",
            "purpose",
            "group_id"
          ]
        }
      }
    ]
  }
}