Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a806b2cc599a6a3232aeaa6e94ed24edf45f1053ea48f1c24bafc6d577fb8204' 
  AND token = 'UENMdQaakmPuO1XzCYpTJQ7nmXFco6nc2mCpeiRDFKs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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