SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0edfb941fdd6b8e992668ce1ec9cba10eab6dfe42b88a3943f053b4e6f077081' 
  AND token = 'K8Z7VIpZe6gBl7wnhvfvJEyLLbhagMBormWnlXYS7mw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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