CREATE TABLE tokens (
user_id int,
regions int[]
);
insert into tokens values (5, array[1,2,3]);
CREATE TABLE regions (
id int,
ru_name varchar(64)
);
insert into regions values (1, 'Region 1'), (2, 'Region 2'),(3, 'Region 3');
SELECT
ru_name
FROM "tokens"
JOIN regions ON regions.id = any (tokens.regions)
WHERE user_id = 5 ;