Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '128db1bb73f7460b69a0403412d87239feea007a4e1a1606bbeeaf66dd6f4e5f' 
  AND token = '5hIhF4O2Faz9EUIOy03IFqCEh2M+0DPhVhQimAqJtYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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