Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0444a6883915800a41487a56aad4f1bba898eab67b778d7d3347946c9946892f' 
  AND token = 'ROcjTTfgtHRIHNuesgSAMJiiYEjVnKoVV58uDc9nFSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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