UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'MkW53lKMJSKh+vOazI0b26Ga0dyoYga8ff4V2+6V7/M=' 
WHERE 
  key_id = '4c5d8cf438bdbf433467d9281abc8447e763f6ed6234a65f38486925deb60713' 
  AND (
    token = 'MkW53lKMJSKh+vOazI0b26Ga0dyoYga8ff4V2+6V7/M=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )