SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ad7af30532a9d8a562b7608ca1171d590fc94b67809aa0a710afea6bd7b86824' 
  AND token = '7m+djSikZGYOJkHtW6NbIz9IqJt5YF7VjEYhvoJ/mC0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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