Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '282669cbc8551986bf0995b50a5baebb7a553aa9c90bc6ff0d68a810da80c978' 
  AND token = 'kRQjdk9zUZUMArfT6o9zWQrcCehzOxjWo/xJBhplh9g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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