Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24f6a9cb278fd002c198bae0249415c1c679eb8209f12d75f0ed05d7141d119e' 
  AND token = '8yqz62jO2TZYRwkg7e0ZyAXPQ2WBbzMqnsSyE4jHfXY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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