Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c17676b7d8992c38efbb80161ee0180027e94ccbe42cd8eca61c82e64a4c03f2' 
  AND token = 'dcCx1AMLY45lHdOLvZOHZVw/XX0uIdKQO5pOjAo6e4s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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