Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13f47d5c79da97935690080febf80b194c3a61596aeb2665eed42ae8f36b462b' 
  AND token = '2L5ZnIEoYHfdZlAqkJ1FgFmNu9dleBQTg1uUEj5yWK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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