Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '089f796276af9c9da44019d99c4caf36aaf75e9051b8eee91052a21224ab2286' 
  AND token = 'q9Hl1/bzAqIkF5D0Znxic/ayHf8Ellg2P1XKHaAIf5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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