You can't able to import privkey if it was pruned mode you need to disable pruned mode before you can import it then after you import you can enable pruned mode again.
The only problem it won't show the latest data like transaction history or the current balance of that wallet.
If your purpose is to make a transaction right away Electrum is the best choice without downloading or -rescan the whole blockchain.
If I will turn off prune mode then I import privkeys and then I would to load blockchain and rescan that. Would I see history and able to see balance of the wallet after whole that steps?