Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60a04043afc755747bb09857058f7796e16b8a8376968aa8412f37500253cfc6' 
  AND token = 'kv7GPemzhUl+sZmom7bTOJe74PWens4wlT9YpIkUuj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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