Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a044ffec6f96a0c281ad7d3e9b6513a613c03dca55e6f54daca99b02b257cb9a' 
  AND token = '9NRxnfgjlpM0Tg/af4wIXqlxNtumYeAhUwy4hOyRPaQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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