Solved:
insert into `spell_x_spell_visual` (`ID`, `SpellID`, `DifficultyID`, `SpellVisualID1`, `SpellVisualID2`, `Unk620`, `PlayerConditionID`, `Flags`, `VerifiedBuild`) values
('1','100029','0','36238','0','1','0','0','0');
Where 1 = integer value. You can set on any, example 2, 3 or 100 or more.
Where 100029 - spell id, for which you want to change the visual effect
0 - can be 0. Not necessarily change
36238 - a visual effect that you want to see for this spell.
0 - always be 0. On current state.
Unk620 - should be always = 1. On 7.0.3 should be always = 0. From pxrwowdev.
PlayerConditionID`- can be 0.
Flags - can be 0.
VerifiedBuild`- can be 0.