Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f80a3040dac12cb304294927a41174b6bad3b0c80fdef6e20fff2a7640020227' 
  AND token = 'gh3inW+W7ibY1NGW1ZYXQODpHOXGIeIfDUYKg8GGDU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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