UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'md+C+PK9we4GeP9GOlCWCT1yMS8ebt++/qkiOZNuWUs=' 
WHERE 
  key_id = '21cf7094bc3a5e1c92c41edfad788f9604de1970a6f192bef782a1bce2957040' 
  AND (
    token = 'md+C+PK9we4GeP9GOlCWCT1yMS8ebt++/qkiOZNuWUs=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )