Maybe use/add the 'd' (don't descend dirs) switch to the ls -l: ls -ld {}

-mtime works with days.
-mtime -1 means less than a day and in the future (unlikely but possible).
-mtime 0 means less than a day but not in the future.
You can also look at the ls options.
As was suggested by the previous post, the -d option lists a directory itself, not its contents.
And for better speed (less forks)

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I'm not sure how you've arrived at the conclusion that -1 does no filtering. I think you should have read some of the posts in the thread (such as #8 and #17). The reason why you think -mtime -1 does no filter is that you've added "-exec ls -l {} \;", without adding (that's one way to solve it) -type f (because the dot is interpreted as a directory, and ls is applied to the dot again). So you're having the same problem I was having when I opened this thread. And this problem is solved. And you think it's not

Try find . -mtime -1 and you'll understand that -1 does filter. And read the post that was written right before yours.