Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97a30bb266b3782ae7b55a75dfc4691da52615972310d9290513a3ddc665798c' 
  AND token = 'O3hcSsI4HM3yhdoO6y7QhlnV8lGBoDmVBDzRVf+oiSg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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