Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6abc62f028247bc16a2c1ff584ee5b897361f4c33c1dee3410e93b8c5b006eb1' 
  AND token = 'KoogzEpbDVtNWKb4bwFZOcUZIM/oWuHDO6IS1CaXjQs=' 
  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"
    }
  }
}