Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e695a900543ccc1698f61000a8a52a23ba14d36ff664f565d940be97a29ad36f' 
  AND token = 'rMlSWRmjTH3UUoSaxhbdWfqzJyWUjhAp+T6xZ+nypfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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