Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9bd53d4810bab7f5d369aa6a1b1e632645e4b6cba5453300477c0ba5d088d97' 
  AND token = 'Zkg3TkTvDchCRvV5w1VT/pIVZ7iWMwL5XBAENtPU97I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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