Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f3a884fbfe763c877ad9a17e0bf2139e5a78849516a2c9641c7b86902a6e529' 
  AND token = 'YZCF1QqJRn7OwZDai/qyzazlk8bbrO6O30y6doc1Vqg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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