UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'zmUWUeR5fjwT6IxEuPUetZDOV10/MKqtm9z2T87P7Tk=' 
WHERE 
  key_id = '51d0a2ad95e65467afec8ac3ccf91bbc6f0766ece044d5fb89b2c75592fdec1d' 
  AND (
    token = 'zmUWUeR5fjwT6IxEuPUetZDOV10/MKqtm9z2T87P7Tk=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )