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

Extensions AlphaCommerceHub
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1 
{
    "Banks": null,
    "Country": null,
    "DocumentResults": null,
    "EmailChecks": null,
    "FraudChecks": null,
    "GeoChecks": null,
    "ProviderResps": {
        "ProviderResp": [
            {
                "ProviderName": "Paypal",
                "ProviderOrder": "1",
                "ProviderResponse": "10411",
                "ProviderResponseMessage": "This Express Checkout session has expired"
            }
        ]
    },
    "Result": {
        "custom1": null,
        "custom2": null,
        "custom3": null,
        "custom4": null,
        "custom5": null,
        "MerchantID": "ANTERIOR001",
        "MerchantTxnID": "1122.2L758",
        "ResponseCode": "1040",
        "ResponseMessage": "Transaction timed out",
        "ResponseTimestamp": "05122017203053"
    },
    "ShippingService": null,
    "TaxResultLines": null
}
2

What is a PayPal Express Checkout token lifetime?