UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'pa8KAaPScRwKtYfIhWnMHtrlmG+zemMuRD0x0+//ntk=' 
WHERE 
  key_id = '493a1be4ba4397b04fc246aa71deee329b3a9622351b2e0198bf62fd5bae9d30' 
  AND (
    token = 'pa8KAaPScRwKtYfIhWnMHtrlmG+zemMuRD0x0+//ntk=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )