Your constraint is using the equals sign, which would mean, the values in DB need to be exactly, down to the millisecond the same as the current date/time.

If you want to show matches based on the date, as in a single day from 12AM to 11:59PM, you can take the URL value and then use operators to manipulate it, or extract values from it, so maybe manipulate it so you can have some like two constraints, one for using the greater than or equal to sign and the other for the less than or equal to sign.

Your data field is the constraint, followed by the greater than or equal to sign, then value is get data from URL (as you have it) but add operators to change the hour value to 12AM. Then another constraint for the less than or equal to sign and again use operators after the get data from URL to manipulate the hour value to 11:59:59 (11th hour, 59th minute 59th second)

There may be some other operators that could be round down to day or something like that to get to the 12AM value.