Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '6c9429f7d9f31624936cff067163a849b9a6658c439e9b8911ec1ae30de2e301' 
  AND token = 'Snfk6S3zy5nmNcJDy6ib9sN5SSsmEGzTOx/ikjPgOa8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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