Incorrect query result

## Bug Report

Please answer these questions before submitting your issue. Thanks!

### 1. Minimal reproduce step (Required)

```SQL
DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (c1 FLOAT UNSIGNED UNIQUE);
INSERT INTO t1 VALUES (1);
SELECT c1 FROM t1 WHERE '1e500' != c1; -- actual: error, expected: {1}
-- [22003][1690] constant 1.7976931348623157e+308 overflows float
```
### 2. What did you expect to see? (Required)
SELECT returns 1
### 3. What did you see instead (Required)
SELECT returns an error, with message "[22003][1690] constant 1.7976931348623157e+308 overflows float"
### 4. What is your TiDB version? (Required)

Release Version: v7.0.0
Edition: Community
Git Commit Hash: 7376954cd868dbc44fc3015c9ef89c53749339a7
Git Branch: heads/refs/tags/v7.0.0
UTC Build Time: 2023-03-29 13:32:13
GoVersion: go1.20.2
Race Enabled: false
TiKV Min Version: 6.2.0-alpha
Check Table Before Drop: false
Store: tikv