You can try TradeStation. Those scans run only your local computer instead of on the server like Thinkorswim. That reduces processing speed so long as your computer has a good CPU. But it requires your computer to download all the data required to crunch the numbers in the scan. Which can be another limiting factor. Sorry but I do not have a solid recommendation. You would need to test out various trading platforms to find one that performs fast enough for you.
My main suggestion is that if you need response times under 1 min than you probably should be reevaluating your trading setups. You are in the realm of high frequency trading and expensive automated trading systems. Your competition in that environment is spending millions of dollars hiring teams of programmers to operate in those time frames. Do you really think you can compete in that environment?