SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd46e2b74a8a18eee3e95c93a14eb7ca822c01f473ffb045627ad92fe67e3930' 
  AND token = 'kCfUG6qfbuh8M+zHJClplBf4P+k23WdG0jQIFzcLGqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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