Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd91abf671abb6cc323821eb0cab5c8e5fe4500142ab2017688643687edcb7472' 
  AND token = 'fuSHwmpI+LQptGFVHsMhID7yf09v5xMmC6FzVGc/kQ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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