UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'gUvCpbw/ty3fUzqOQ+8RbI1C3FehVwksNtMdAe5cRhc=' 
WHERE 
  key_id = '796c94e9e95e9102dc26be31a3af7f006006da4f04b67fa24bb6caedcebb9a54' 
  AND (
    token = 'gUvCpbw/ty3fUzqOQ+8RbI1C3FehVwksNtMdAe5cRhc=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )