Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8b5de7bc47acca55f63fefc4ca54935f8d9f9579ffc3a57da19bea08cda7f61' 
  AND token = 'tZXpq5eqPGKV6R67Ph1F/ACtQlFcchpuWLboBdfibdI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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