Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddd9019ab2e6bc4c973954d37f10e784df85db8795603e9839c1213ded79936b' 
  AND token = 'y9Wh1ammKYBtarGSHddu/HK7D4v5E6MmTHJBZtXbHmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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