Ryzen 5 2600, gtx 1060 6gb and asus prime a320m-k comparability?

You should go for a B450 motherboard. That Asus a320m-k may not have its BIOS updated for the new raven ridge CPUs (ryzen 2nd gen) and that means that you'll possibly need a ryzen 1st gen chip to update it.
Also A320 chipset motherboards lack in features and power delivery making them unsuitable for overclocking.

This is what I'd go for.

PCPartPicker part list / Price breakdown by merchant

Motherboard: MSI - B450-A PRO ATX AM4 Motherboard ($69.99 @ B&H)
Total: $69.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-10-28 17:38 EDT-0400