What is the PayPal Express Checkout token lifetime?

Development Payment
1

[AlphaCommerceHub] A 1040 / «Transaction timed out» / «This Express Checkout session has expired» response to a PayPal’s PaymentStatus request.

2

By default, the token expires after three hours.
To extend the lifetime of a token to 72 hours, contact PayPal customer service.

developer.paypal.com/docs/classic/api/merchant/SetExpressCheckout_API_Operation_NVP/#setexpresscheckout-request-message