SET @v1 = '';
SET @v2 = '';

SET @Query = CONCAT('SELECT sum(colName1), sum(colName2) INTO @v1, @v2 FROM tableName WHERE id=1 ');
PREPARE stmt FROM @Query;

EXECUTE stmt;
DEALLOCATE PREPARE stmt;

SET @Query = CONCAT('SELECT id, name,',@v1,' as value1, ',@v2,' as value2 FROM tableName WHERE id=1 ');
PREPARE stmt FROM @Query;

EXECUTE stmt;
DEALLOCATE PREPARE stmt;

SET @Query = 'SELECT id, name, ? as value1, ? as value2 FROM tableName WHERE id=1 ');
PREPARE stmt FROM @Query;

EXECUTE stmt USING @v1, @v2;