Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c899f544e4311a7a30d6ff9fb616998142f684a1b0f7d59d9f3730a7ccea39a' 
  AND token = 'BwUyDXOcrqQYmfcnzFoOXvwLIf2qjep7E/4C0lssO8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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