Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b54fdb12f1e1166d71fc95fd02f56dcaac7c7d0c625440fd3bf66307ed34814' 
  AND token = '0vc51WfzrZnWAYi4C3OQLCVKXSJQoPceF4ArtHUDlXQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}