Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc05e0214c55e22bd5642566acc003d6573ca5c795cdcbec105042f4807ab859' 
  AND token = '6qdCzGBOrlu7BL9sxAsl2pp12g5eiLfkkCDoS5pjScQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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