Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a59f1939d707470bfad72929ac81993ba7dbc641a69b844ad4e0e9e9d72aa7b' 
  AND token = 'VYpSeHWNc9MvLqoasnrHIoFiO/Ax/kjxzzq70I47LvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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