Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae65e1341d98383a7c6ee34e095d3a565ea3688c28b5e63d184a71a562280683' 
  AND token = 'DW009Y0NUAl52z+nlTRavk/wiJGh7WswFqLYDCC9N3k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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