I would not let the timer expire, as RJ has previously stated.
The payment will automatically released at 30 day mark, I just don't know if it is from initial order or shipped date. See info from AliExpress below:
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Payments via escrow are protected with VeriSign encryption, the highest encryption technology commercially available. You can be assured that your credit card and account details will never be exposed.
With escrow, payment will only be released to the supplier once you have confirmed satisfactory delivery. You can track the shipment at any stage during delivery. However,
if delivery is not confirmed within 30 days of receipt, payment will automatically be released to the supplier.