Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8166c6461c28827c20c40e972277a78dcadbb965eff15785726c00e1d0e747cd' 
  AND token = '/dGgLjGUztiX0QfHtJC5BTCiOg9gxPM2Ix13QienLvU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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