gateway MAC discovery with net mask of 255.255.255.255

I have an ISP that gave me static IP config to put into my windows configuration,
192.x.x.x 255.255.255.255 gw=10.10.10.10 DNS=…

Looks like point to point config as there is only one host on my network 'cause mask of 255.255.255.255.

The question: How does my computer discover default gateway (10.x.x.x) MAC address ?

I tried to setup wireshark and did

arp -d *
ping 74.125.39.104

but I dont see "who has 10.10.10.10’ tell 192.x.x.x " arp request in the capture.