Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a76b119a7d90c9df28fccdee1963f21464604a44fe5449178784e4c1d58ad4b1' 
  AND token = 'fLqcTGecZ1lFgIex64ypkiZxk8nIfTCBDlQS1p2qwZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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