Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd595507e2446498537485c56137241605e5b3b81d19ebe55a304212aa8a25ca' 
  AND token = 'mGEAGH4SCn+zLROjdnLvUvl6guovcZY+nRGDo9s2bj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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