Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33ffd232fdb46372650615b136b102f161ba3e570e79568fd637500e4f958c94' 
  AND token = 'l+B3cx/30KIK/ECBtILg4S/K4sjPiXt6u2hJamanASY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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