Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1d93020979386f59a57f10035412dd3fcd3a324ec6b2813dc82bcc88be41a84' 
  AND token = 'xk4lv911VdhkugvcyjFkn+lp6tQ7xuwvNepwdnePK4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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