UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'W+B46M7PsPOButCRihT56x4veNR3O3huUP4U4dft0TA=' 
WHERE 
  key_id = '4919e7b731297fef233d1f3959309eaaefe548997fcc7b8233d11fcd9f892850' 
  AND (
    token = 'W+B46M7PsPOButCRihT56x4veNR3O3huUP4U4dft0TA=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )