UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = '/fuRc6/Gz+c5o9qGD9vR7S6U5fPvKawGo5N3+je6QRo=' 
WHERE 
  key_id = '303948a0d8473b2b484a63a61d22cabfc763bec2e859ec3f9c45c8014ccd1384' 
  AND (
    token = '/fuRc6/Gz+c5o9qGD9vR7S6U5fPvKawGo5N3+je6QRo=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )

Query time 0.00028