Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35287d187f13f0a094b4947af6ec9c60cc2d9a77fc3c4d9641f602bd937b7dd3' 
  AND token = 'pf5yltr84hQvh4Q7jkPYyQT0Duecqnl/mUED+IQ1DH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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