Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66b47a41d5f6b9ee1d4d5a8dfc811de5dad4bb8a0c9d97e2f675f74ebfa2f28e' 
  AND token = 'THw0IDtdesF/ZN2MvIUoANA3tI6jOUAqnuxNHeeJp/0=' 
  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"
    }
  }
}