Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a001f0f474300d6020165a1d265d3a00834295bffec7aef5d85570e01852a689' 
  AND token = 'CWISZtRDhqAOpY0iwhv5wps6zHkbrgt4seFtylr0I28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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