Huh. Neither site actually has this data available for me on those pages (!). Guess now I know why there isn't a thread about this already.

On the part of the KLM site in your screenshot in my account it just says a generic "Award Miles are valid for a period of 2 years from the respective date of earning. Some of your Award Miles are about to expire. However, you can extend their validity by making a qualifying flight before the expiry date of the Award Miles." And on the AF site for me the "Your Miles epire on 31 January 2020" text line in your screenshot simply isn't there.