UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'Ds6uFWGDj1VamYCyq/9KXmAw3XBY1ljnQS6NaRoulVg=' 
WHERE 
  key_id = 'b6e8f70c170984218c6df51c324a3129ccf35050d0f23acf4eb23ca26fd509c4' 
  AND (
    token = 'Ds6uFWGDj1VamYCyq/9KXmAw3XBY1ljnQS6NaRoulVg=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )