Convinar AND y OR en mysql

[hackjose]

Esto:

(SELECT * FROM `eventos` WHERE id_usuario = 1 and time_fin < 7000 and time_fin > 300 and `id_casilla` = 2)
UNION
(SELECT * FROM `eventos` WHERE id_usuario = 1 and time_fin < 7000 and time_fin > 300 and `id_casilla` = 3)
UNION
(SELECT * FROM `eventos` WHERE id_usuario = 1 and time_fin < 7000 and time_fin > 300 and `id_casilla` = 5)

debe ser equivalente a esto:(si fue asi?)

SELECT * FROM eventos WHERE id_usuario = 1 AND time_fin BETWEEN 7000 AND 300 AND id_casilla IN (2,3,5);