Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f27258d1e0282f2b822196b46e661f44f3f811cd8912706f3a408e11bca3864f' 
  AND token = 'TjI0VIutIuq6/kEtcVQmpgnHhMs26w3Fz2anAKcU0+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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