SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24de13647b47d33fe5dcb97ab4c641bd58cadc12b0d875b189c25f824870a6f0' 
  AND token = 'qIRf9j9eTgTFAvzXQKFArZQiBPWR+vhyQceIr5c6vUM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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