Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e9caff4e016d8e32c2be819653a9b0a96545e0bf29f88f1c78f13e3c1b34aa8' 
  AND token = 'Ofon5uwE+IkPPvL1mqTGnL3TYAf5NclfEdJKqKvCr/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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