Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '293bd6310333d4098178752af55e38756653d9e2de9c32149a5a3267bd3fe92e' 
  AND token = 'AVh6FfwDw/bp2Vvf/bKPFxxDVNRJ3SNPFeeOfHPFrPY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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