Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de5e533a53eaa50e74318ce03f9dca261eb7885f253b91a4a3ada2e713feb904' 
  AND token = 'KhpsHXri3dPJZoCPHA6el6qgKAOt+DvCNNA+1r6HnTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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