Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c1221db3f014fca53b4a39eea624ba5e40eb4afcc8168ecbb453ab699e291efa' 
  AND token = '5r1QIikrkzQ4v6kGE44RoUgg6t1J/XiEq/xXkRngAPw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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