postgresql – Mysql BETWEEN request returns empty row

I have an entry like that in my postgreSql DB :
(enter image description here)(1)

! (1): https://i.stack.imgur.com/sS9uk.png

and used this sql request :

SELECT * FROM "options" WHERE 'startDate' >= '2021-05-01 00:00:00.000+00' AND 'startDate' <= '2021-05-31 00:00:00.000+00';

That should return me the entry but it doesn’t 🙁

I tried this request :
SELECT * FROM “options” WHERE ‘startDate’ BETWEEN ‘2021-05-01 00:00:00.000+00’ AND ‘2021-05-31 00:00:00.000+00’;

Returns an empty row.

I also made few tests with those request :

SELECT * FROM "options" WHERE 'startDate' > '2021-05-31';

and this returns the entry (it shouldn’t because ‘startDate’ is 2021-05-04… I also replaced 2021 by 2022/2030, no matter what date in the futur, it’s returning the entry…

So guys please help!!! Thanks a lot!