Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fd1fbbfd6d1aab384ae10e00ead25136dec2908f08eb3b730ad742994c1e2398' 
  AND token = 'HelmaMvabpRtukZcUNT+9e+zOSvdlI/dMYMzeiXwjt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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