UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'MC9o6pRp2Bjzw0RCdrBiiCfknQqsS4H2fYjFAhYo+Ug=' 
WHERE 
  key_id = 'decf41fb040506d3121d7e8c64c9af889d11b229c51d9a90a403b7a36e0dc4d5' 
  AND (
    token = 'MC9o6pRp2Bjzw0RCdrBiiCfknQqsS4H2fYjFAhYo+Ug=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )