Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c39229497340efb78cf39b04584a2524f73ee9e426bc5e1e113d026bd02124d7' 
  AND token = 'XQw/jYScpVRcEhM5XnzMfEqb6sSN52W2lqVKDNgcstw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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