UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'g0g5OBpJq+u+0zydQNEanK7olnHKIK8qltrgGM0wXII=' 
WHERE 
  key_id = '255dfeeb5e2ca70a1df0c633f52e9a93abb93eaa471755d69c04c727da928a08' 
  AND (
    token = 'g0g5OBpJq+u+0zydQNEanK7olnHKIK8qltrgGM0wXII=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )