SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05c275e30eb28ab1c965417c6564c81cced4ccb7f80bd9b5f90bd2fbd76e63d9' 
  AND token = 'NlXkLJ+Uuf9yTk9qmDA+zQKYiT/F7ZGlgaWvqFx59Tg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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