UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'My+Ur43p0y91w13juKzBoeEdyx3KJ1WTUWGjjGbGJE0=' 
WHERE 
  key_id = '2106021a5cd3e01b255d6c2a84678f4e8ff92cca7db46c2bda03199b1da7c797' 
  AND (
    token = 'My+Ur43p0y91w13juKzBoeEdyx3KJ1WTUWGjjGbGJE0=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )