Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9074cd48a29e0cebb75e1f5cc0f7e0a31f844456149dbe48242f9e726683e3ae' 
  AND token = 'XXykC2WbHXTMtId/i5KstqigUkO3cJI+vuhU2+uMaSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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