Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9338f3bd867023c328d03ec061a519b1cb6a8f9a30b9e76b240274e72933daa3' 
  AND token = 'nlemPwU9PKWo8TpN9Y5kzf4tg61x0fjr6o7cFbDpmC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}