Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd9c479f96395d2c3138dde5a2c4ca83463be6bae1e8860a8c8f55afa24ae78d' 
  AND token = 'UdzGHrAwZTmqE4ypKcYV5xogjU+85jeMALSiToHUozA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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