Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7384b403a83b3040e27a503fad52ec77402d369d9154c34945c1c131c64bcccf' 
  AND token = 'RsdmMZkirgp6PO/gn09f3MAIsAUQr+HSFj3cBX7UjMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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