Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40d25749c1417dd5acad70be5b16703a35593055e35b45f6b111d5ec09b83d5c' 
  AND token = 'fg+qDJECgr1An/Vptdu0utlOzcARDkuUJEu8XhH1Gak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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