SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b338d5d7018ab05070a555e04c24e6024caef827979028f98b1d6a73d9b6f57f' 
  AND token = 'Uj7CTNZyibDovQpb4pmwDg7cZRRS3wNjTn9jJvGgOJs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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