Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f516c8475aee6e4ebb789eacf0f3ba5ccd8949bb971321105f0ab1a96d772ebd' 
  AND token = 'hedt6uTa2VchYECI5RhgLClmUTDaobyj2wSDfb1RbgI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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