Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25b7200c72d10fccb2ae2220c435c209032df345a7e0541847eea349cf6e2421' 
  AND token = 'K7EordWlOGoshJ+2jAZOYbOKo5EvL3pjF8jzff9WOuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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