Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b9f36aeb18a3d973f65433386aa728ba3bae04b529eb0a8ec5c0668e0c5fbbf' 
  AND token = 'HcrRLAR0wwMMicvP0j+FtozCzRLC1RssclKual+yJco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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