SELECT 
  wishlist_id 
FROM 
  ushop_cp_wishlist 
WHERE 
  1 
  AND session_id = 1777105821

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "1.05"
    },
    "table": {
      "table_name": "ushop_cp_wishlist",
      "access_type": "ALL",
      "rows_examined_per_scan": 8,
      "rows_produced_per_join": 1,
      "filtered": "12.50",
      "cost_info": {
        "read_cost": "0.95",
        "eval_cost": "0.10",
        "prefix_cost": "1.05",
        "data_read_per_join": "680"
      },
      "used_columns": [
        "wishlist_id",
        "session_id"
      ],
      "attached_condition": "(`marketplace`.`ushop_cp_wishlist`.`session_id` = 1777105821)"
    }
  }
}