Switching 60V with 3.3V microcontroller at 50kHz - 1MHz
The 2N6782 N-channel FET is rated at 100v drain to source at a maximum 3.5A and 15W max power.  I picked a through-hole part because the surface-mount part would be difficult to solder by hand.

To drive the FET, you can use the LT4440-5, which takes a logic level in and can drive an N-channel MOSFET switching up to 60 or 80V depending on the version. The supply current is negligible, only a few µA.  The driver only comes in a surface mount part (SOT 23-6 or MSOP).

The only drawback is it requires a supply voltage (VCC) between 5 and 15V (thanks to the OP for pointing out this variant of the LTC4440 with a lower minimum supply voltage). Since you have only a 3.3v supply, you could use either a voltage doubler or a simple boost converter (such as the MIC2141) to supply the VCC voltage.

Both the driver and voltage doubler/boost converter should only require a few ma (if that) from your 3.3v rail.

The FET and driver should work up to 1 MHz, maybe a little higher.