Added new index to deploy_tokens table

db/migrate/20190719174505_add_index_to_deploy_tokens_token_encrypted.rb

+# frozen_string_literal: true
+
+class AddIndexToDeployTokensTokenEncrypted < ActiveRecord::Migration[5.1]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :deploy_tokens, :token_encrypted, unique: true, name: "index_deploy_tokens_on_token_encrypted"
+  end
+
+  def down
+    remove_concurrent_index_by_name :deploy_tokens, "index_deploy_tokens_on_token_encrypted"
+  end
+end

db/schema.rb

@@ -1126,6 +1126,7 @@ ActiveRecord::Schema.define(version: 2019_08_20_163320) do
     t.string "token_encrypted"
     t.index ["token", "expires_at", "id"], name: "index_deploy_tokens_on_token_and_expires_at_and_id", where: "(revoked IS FALSE)"
     t.index ["token"], name: "index_deploy_tokens_on_token", unique: true
+    t.index ["token_encrypted"], name: "index_deploy_tokens_on_token_encrypted", unique: true
   end
 
   create_table "deployments", id: :serial, force: :cascade do |t|