TT#76784 Improve slow expiration check queries

Change-Id: Ie3e1a9136159643d3bb39b46e7dd3ecb159608ac
(cherry picked from commit 53d311b294)

db_scripts/diff/15586_not_replicated.down

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+SET sql_log_bin=0;
+USE `fileshare`;
+
+DROP INDEX `sessions_expires_at` ON `sessions`;
+DROP INDEX `uploads_expires_at` ON `uploads`;
+DROP INDEX `downloads_expires_at` ON `downloads`;
+
+ALTER TABLE `sessions` DROP COLUMN `expires_at`;
+ALTER TABLE `uploads` DROP COLUMN `expires_at`;
+ALTER TABLE `downloads` DROP COLUMN `expires_at`;

db_scripts/diff/15586_not_replicated.up

@@ -0,0 +1,10 @@
+SET sql_log_bin=0;
+USE `fileshare`;
+
+ALTER TABLE `sessions` ADD COLUMN `expires_at` DATETIME DEFAULT NULL;
+ALTER TABLE `uploads` ADD COLUMN `expires_at` DATETIME DEFAULT NULL;
+ALTER TABLE `downloads` ADD COLUMN `expires_at` DATETIME DEFAULT NULL;
+
+CREATE INDEX `sessions_expires_at` ON `sessions` (`expires_at`);
+CREATE INDEX `uploads_expires_at` ON `uploads` (`expires_at`);
+CREATE INDEX `downloads_expires_at` ON `downloads` (`expires_at`);