UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'gAUazLQS4bWGTYG8fPHermVRcGL2tw2DDHDeUcq5rSE=' 
WHERE 
  key_id = '793d91421ee9036653d3e16797306aed8851256a516c00339517395f7c30541f' 
  AND (
    token = 'gAUazLQS4bWGTYG8fPHermVRcGL2tw2DDHDeUcq5rSE=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )