SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc2c7f8815bf80f03f7564a0e9287c935696a9c80e483098462c0c1cb381b522' 
  AND token = 'CZpwiPvQDIoTUknBKC/zET9NtIYh4xVXhJ0ggCvzFyI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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