SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f5f5b9407c5d0d09fa04d7222e379e969451d499835b2599acf4c6732f194d3a' 
  AND token = 'lPxCd6NgvjD3RDhKDaCbs4EUGARgqiKlnoV3iuAQHSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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