Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24320bca298499ad0bc3d7edf46c6013d48143efd0c15eda00b7a537a83689a5' 
  AND token = 'd0lesKBpVKqBQZL+lNL4mrzSFmkU84UC7k44vi1LccE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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