I think snacks from the strict regions of Russia can still be bought. because:
The new coronavirus is very weak in environmental tolerance in a dry environment at room temperature and will be quickly inactivated. The time it takes for the new coronavirus to be transported from Russia is much longer than that on non-cold chain and non-fresh foods that can maintain its infectivity.
Many food production processes already include a high-temperature sterilization process.
my country’s Customs currently conducts inspection and quarantine on imported goods and sterilizes external packaging.
If you are worried, you can wash your hands carefully after unpacking the express, disinfect the food packaging with ultraviolet radiation, and heat the food inside before eating.
If you are both worried and feel that this operation is troublesome , you can of course choose what you feel is safe to buy, it doesn't matter.