SELECT 
  addon, 
  priority, 
  status, 
  unmanaged 
FROM 
  cscart_addons 
WHERE 
  1 
ORDER BY 
  priority

Query time 0.00078

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "200.20"
    },
    "ordering_operation": {
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "166.00"
      },
      "table": {
        "table_name": "cscart_addons",
        "access_type": "ALL",
        "rows_examined_per_scan": 166,
        "rows_produced_per_join": 166,
        "filtered": "100.00",
        "cost_info": {
          "read_cost": "1.00",
          "eval_cost": "33.20",
          "prefix_cost": "34.20",
          "data_read_per_join": "307K"
        },
        "used_columns": [
          "addon",
          "status",
          "priority",
          "unmanaged"
        ]
      }
    }
  }
}