Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '735a3944a2c9f93b45f467205a82b482e00109ba98dbf7ed9cb5c03d4eea952b' 
  AND token = '8ZIgp71U1WGpXhDIF35Vf9wxFIk9N41OW7oUm/csRfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00067

JSON explain

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