Help finding a correct 'file mask' to quickly search for a line of text in one of todays files

I am in process of trying to find a quicker way of finding a specific product code in one of the 100's of archived .csv files. the code specifically should be in one of the files from today is there a quicker way of looking for this instead of opening them up all individually?

I've tried using the built in 'Search for text' option but none of the file masks I'm trying are working, only the default *.* which is unusable as there are maybe a thousand files in this folder.

I've tried <2023-10-18 & *.csv<2023-10-18 but neither are working. Any suggestions?

You have the condition reversed. It should be *.csv>2023-10-18.

Though you probably would want to simply use *.csv>today.

See https://winscp.net/eng/docs/file_mask#size_time