Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e708e18c3c2d6f0c78e2687ee6883683038f17128b178d14b66144e8ccb6c8b' 
  AND token = 'wN3O/szUHuePbAvKVBAR+wXWoMsKpsiQxe7tMb2bhQo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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