SELECT 
  cscart_ab__preload_links.* 
FROM 
  cscart_ab__preload_links 
WHERE 
  1 
  AND cscart_ab__preload_links.status = 'A' 
ORDER BY 
  cscart_ab__preload_links.url asc

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "read_sorted_file": {
      "filesort": {
        "sort_key": "cscart_ab__preload_links.url",
        "table": {
          "table_name": "cscart_ab__preload_links",
          "access_type": "ref",
          "possible_keys": ["status"],
          "key": "status",
          "key_length": "3",
          "used_key_parts": ["status"],
          "ref": ["const"],
          "rows": 1,
          "filtered": 100,
          "index_condition": "cscart_ab__preload_links.`status` = 'A'",
          "attached_condition": "cscart_ab__preload_links.`status` <=> 'A'"
        }
      }
    }
  }
}