Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f4a954e7576054eb8c886414a9166cc85f839cdbd068380c42daca073cb1dad4' 
  AND token = 'A/XVow2DJ3gVihb6N/3BhcpXEnau45BgICuRr8DUIx4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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