SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41060a66542618a6d1bbbc797a20c9d2e029571ed28b290b391f1b22c7f3c008' 
  AND token = 'KmPoHbwxXOgi0w//DST/z4+qo4sgpVOv5qGIogumVeQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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