UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'xynMrrZ4m53cwrTyj3JFMi7VaWYR5zg/e+hgJCX/cTE=' 
WHERE 
  key_id = '50baae0a634d7ca3f3b0a4bab267a1f7a36d6d4bd3d075a9091b35d9593d19d5' 
  AND (
    token = 'xynMrrZ4m53cwrTyj3JFMi7VaWYR5zg/e+hgJCX/cTE=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )