Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2aaba6f6736896be368ba6d0f70b4e83eba9735674cbce3199f92dd38a684dad' 
  AND token = 'MITqP7xgoRlaHstoBzWkYnV9T44MQzq8Q3DBR/C8NS4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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