I believe there were some pushes to get rid of opened box = no refund policies as being against standard 14-day returns in Norway, because the law explicitly says the consumer may (paraphrase) "reasonably test the use of a product" which allows you to open the box on other goods. But keys being consumable puts them in another category of goods (like food, which obviously can't be returned after "use"), so that doesn't apply.
I believe there were some pushes to get rid of opened box = no refund policies as being against standard 14-day returns in Norway, because the law explicitly says the consumer may (paraphrase) "reasonably test the use of a product" which allows you to open the box on other goods. But keys being consumable puts them in another category of goods (like food, which obviously can't be returned after "use"), so that doesn't apply.