Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46b25599513f2717f75420f4753d0f59c09472b48d375c571b9d5ef6483cb5ad' 
  AND token = '5mdtDKDxYtFenkLpZiRRAWvOrLsy6T2GAG3nYg8V3fo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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