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

Query time 0.00166

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.053575273,
    "nested_loop": [
      {
        "read_sorted_file": {
          "filesort": {
            "sort_key": "cscart_addons.priority",
            "table": {
              "table_name": "cscart_addons",
              "access_type": "ALL",
              "loops": 1,
              "rows": 53,
              "cost": 0.0194938,
              "filtered": 100
            }
          }
        }
      }
    ]
  }
}