Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc5bc549699b56b68376c712b15b95b198cc6d825942f52c76f9b15ce715fe67' 
  AND token = 'm7bIFA+uU+Ma6GVh6qfI9c/QBVY6VWbTp8iBEk9cETU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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