Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '410e454bd3d5e88b4d87c981474a94c1591c70f4594d445b4a0b31f456e38955' 
  AND token = 'Bq1DnFWNjGTSY1PfbU1lg9FHN5zorNZZDD8dWFJv25s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}