SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a9bed363c4fa7f826b65d4e749eb4f683b2f724b308610a6ea174a6b04f05e8a' 
  AND token = 'FEgHxZw9sHDt/lDnnpg+NZiUgK9DbXZuORxEdOMvu2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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