UPDATE 
  cscart_lock_keys 
SET 
  expiry_at = UNIX_TIMESTAMP(NOW()) + 300, 
  token = 'Nw+Uj32HfUI7i9C0XBeaYKwYQhn1pUMa+RG+z2znfag=' 
WHERE 
  key_id = '27a536cb654562e8ca6fb8311576089120a0f48a161684639640b18b0b0af933' 
  AND (
    token = 'Nw+Uj32HfUI7i9C0XBeaYKwYQhn1pUMa+RG+z2znfag=' 
    OR expiry_at <= UNIX_TIMESTAMP(NOW())
  )