UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'l2+6iCgh+h3kwoHj9mIS2+yB0RNoff7gdnOYrT2L+kU=' 
WHERE 
  key_id = '76ed704455c4f195ac7220e1ffaee33e98e2b32cfc9a59f65114cf2dbc2e54c9' 
  AND (
    token = 'l2+6iCgh+h3kwoHj9mIS2+yB0RNoff7gdnOYrT2L+kU=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )