UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 30, 
  token = 'C5mvfrZBKPMgo4Mafv/7b8bBYjAMbxqSXQab/JCNWfY=' 
WHERE 
  key_id = '851fea71d6fe825ece5985ccee86711b181c347992467e302f90b7e2c1748df7' 
  AND (
    token = 'C5mvfrZBKPMgo4Mafv/7b8bBYjAMbxqSXQab/JCNWfY=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )