Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ff99873489fcc3fa83a49c9621781615f16a701af44e87cf6bb38144a534c97' 
  AND token = '9clvOqBb36bOGz2ifq13ycTXMj4CCMiViv6Z7lf6a+s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00072

JSON explain

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