Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '924ce7dc4a4cabd405e12e1d7b830d739de20ca1e8cf37bfa3ea82aec16a60b3' 
  AND token = '1rAHhURJHfHSI5CsTtQblXi2S6FqtCbXCsF5Ve+Ykvw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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