Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e874f0a3421f1a75abc153f4a3f168588fc4bb2eabb8d4d5aa8a98bd181a8e63' 
  AND token = 'FRW2lYpWPXRivFozt8vpIuBPcUff00lU5PaEz4H4YDg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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