Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cce00b652279c26b48d2edd2f30a9951f47a83f69589d5fb322b470224dbd2a4' 
  AND token = 'P50IUXyYHcd6SNWQ5ieVMk/3IBHNY7ARP5HHaO4elWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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