SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5a1f64f1e26d02c6a93c90e358afd2057d8ffb54223d44c0d0c8190f1e33bee7' 
  AND token = 'nKyuMrAb/sBx/DAv1OgXNcx9LLjJL8b6m1Mm/U0XHqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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