Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76014ac372c5a53f444d64ebfc1e15e05fa99b2d9daf7d2d08afc58c0beeba6b' 
  AND token = 'Gw7VpQY/KsZ4BmSiOy1pF/zBc71OW3oL0bID9IV9EBU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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