UPDATE 
  cscart_multi_declock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'Wpb5bWBJMRQBpenXvQVQKieXI1vfguMfQi6E0WYRhLY=' 
WHERE 
  key_id = '51a845b270b8f1bd7914a3dd13b58f1a6fd2620d2b8b25a0ce25a60c4593a751' 
  AND (
    token = 'Wpb5bWBJMRQBpenXvQVQKieXI1vfguMfQi6E0WYRhLY=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )