Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a843b3e28638e91273a37d7c4dfe7239504acf02142d702eb7eef8e660d22369' 
  AND token = 'Fm1Zcr/JtDAdXCOgriTyQN9oULJ/IWOWPIVaQVeLj2E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}