Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bba8a245b917c577ebcd4a8f0439a76f8ffe0ef4ddb93b61e09bdf3effee68d9' 
  AND token = 'xPrbjs7yWWhBOf1BXKghqGI5+FOfm72h5igZ369GV+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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