SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8956714d1710ca18c45617c36cbbbf45b89fd2558ad7e992760022dacdb0b1f8' 
  AND token = 'PgIftVav7jY8I7IjhLA6kM+ySG+UmTC+5QpAfFzbDUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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