SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bbf47ee4c01db7dfd921c83f02356ec0d3785d6602a6a49d7ae5f8e758e6009' 
  AND token = 'Wiu4fP9vgUwjlg57u3BIzYhgqL+vIV4RN1dBLqrJ+ms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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