Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f6be07f9d9842e2874b50f65fd74005cbeef0d587170e01ac5c86a4ec98f864' 
  AND token = '0jGRBS2e9vgYu5JWNWhWcXjHXjgTcfMWYTO/8FhZY3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}