SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf01505a9276c17f63948de5aba7272f38c9af45eee0201f8c8df2c24b37d95b' 
  AND token = '/eVGMnvRojiq+uuBsYm2T8p0UV80z77sHEKSEnDAvdc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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