Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '666d63b5f3b6e7c70421ef8c05eef843c95cdd9952742ff4bd06929bcc29719e' 
  AND token = 'dEDBSKpgqtneXlf9c/nxx6PA9fJQQ9znTQ7zLus16/g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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