Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c5a57adb661f637ae49d88ece2e1c7cd8081dfaeb62af811c74832cd43f6867' 
  AND token = 'N0/TS3byia0jgufe7N2eJ8tNH1HPU34M9s3ePIiXXzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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