Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29ab748c4f0aa05a0edab047f2dbfc39c82090eec13549d9550ff95002983b20' 
  AND token = 'ApjUiPVuOtBZAtOmkll03uN3ONUheE5honGBC5Nyy6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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