Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b143fd5671cb1ebf5b3b53447804caa800fc24569de2e3e85b42b7bceea5bbd' 
  AND token = '4U7CRzquN2l/t69V1+QS1K47uDFFWNYUufg9kM5NKb0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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