Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4fc168ea6a534419060fd37de6043662cfe4727f917427f18089047f1f6cbfa1' 
  AND token = 'ZK6l+5XItxWLPvuIf/9UpV4zrsY0N6ei48JxXrCAXCc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}