Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5f3cc66550192e7abc82137762eb9e7359cf5ae374903bd9ba68e07deb18a00' 
  AND token = 'xLbiXdh5sGl2JcECou04TCTlp4nVhqBIBZqXgpkF4x8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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