Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '21c169ab590e36eab6f1c89f955c8da8a11f6d19981daa38bfeedd19ed122fb6' 
  AND token = '7ozKYIBDG46KzqU1YG9D/o5pnOvEc486FkZ2ItLWHd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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