Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '3aa8b900e67ab343c7078673483cef2c131fda4cc351c61fdc54530f83d66191' 
  AND token = 'WbVnZZ+WEvi94mK7KO9kLOEmf+HxpI1AA1vVXrYsM0o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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