SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '005cd06bd57c9ddd413f64d074c5b68c1eaa3a3151f4e74b75832759fdb47229' 
  AND token = 'wMlwY6zXE+iQztxYglHV6w0dowR9Xvh8MZTpob9+nGo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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