Our company employeer's who are they working over 40 years

DROP PROCEDURE IF EXISTS  `negyveneve`;

DELIMITER //
CREATE PROCEDURE negyveneve ()
READS SQL DATA
BEGIN
    SELECT CONCAT(`FIRST_NAME`,' ', `LAST_NAME`) AS 'FULLNAME' FROM `employees` WHERE FLOOR(DATEDIFF(CURRENT_DATE,`HIRE_DATE`)/365.25) < FLOOR(DATEDIFF(CURRENT_DATE,DATE_ADD(CURRENT_DATE,INTERVAL -40 YEAR))/365.25);
END//

DELIMITER ;
CALL negyveneve();