Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abcc46d4f255c1e3eff895ae5271b3cd24e59d220ab621c726407b2d6dbd1604' 
  AND token = 'l7cfji5wFb4glMJu7qnWFVTHQPAqk4e+DaqnB3xkDqM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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