Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '462ee43625e957af7922a4d65f9838a1d45e18331eaa625224850002094783e2' 
  AND token = 'XBRzdzsTZWLr5zfWxUqYNAlQJW0z8OPikj1Z1dn6S5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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