Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f1e3739e906cdcf4eaf92b448c58a8d9f41d0390777fdfeefbe4093e2134ec7' 
  AND token = 'NvivC7O2FoT83PAgi5vfNLUyTt6aVWVGUMIIBIwhGIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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