Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ac1933dbaa10c54c41e2b5351048e77bc7ae8fc64661a7d7de50ad8768c0881' 
  AND token = 'xp847FbvTAQbOKNBe87sk1SRhvYirUwtOS3v7yPx5ks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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