Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fbd25ac8e9a2ede7dcfed93c0550e0d6051def28fa9602c4f7faeb1cdb27437f' 
  AND token = 'hUUvpF9/7XuCakkapRrhgjxsqQFUd2nwC0jKF3ipkas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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