Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a3d8e08b296a6bb932076d8036b162ffa430be6feb5c9201435ef9c7f68b72f' 
  AND token = 'BeoZNigT8ZXOYrbUMRBRVZNeNgZgked+SVaMfDskW5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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