Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6d3590c568d3b21c7d93b52d27d7ea1abc305096adb3032579f8a611ebec63b' 
  AND token = '2jt1ZGobYFdq8hfjns60JgQVl76LIGu5n6Y9N4CzF7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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